chore(deps): update redis:alpine docker digest to 7521abd (#3035)

Author: renovate-bot

helm-chart/templates/cartservice.yaml

@@ -252,7 +252,7 @@ spec:
           privileged: false
           readOnlyRootFilesystem: true
         {{- if .Values.cartDatabase.inClusterRedis.publicRepository }}
-        image: redis:alpine@sha256:d12963afb039f10c1fa933187e0d60a128b4d355bc4575d6c143674b38b28019
+        image: redis:alpine@sha256:7521abdff715d396aa482183942f3fe643344287c29ccb66eee16ac08a92190f
         {{- else }}
         image: {{ .Values.images.repository }}/redis:alpine
         {{- end }}